| Message ID | Y9xi7nFWRV3S9gCg@work (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [next] drm/vmwgfx: Replace one-element array with flexible-array member | expand |
On Thu, Feb 02, 2023 at 07:27:10PM -0600, Gustavo A. R. Silva wrote: > One-element arrays are deprecated, and we are replacing them with flexible > array members instead. So, replace one-element array with flexible-array > member in struct vmw_view. > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > routines on memcpy() and help us make progress towards globally > enabling -fstrict-flex-arrays=3 [1]. > > This results in no differences in binary output. > > Link: https://github.com/KSPP/linux/issues/79 > Link: https://github.com/KSPP/linux/issues/254 > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org>
On Thu, 2023-02-02 at 19:27 -0600, Gustavo A. R. Silva wrote: > One-element arrays are deprecated, and we are replacing them with flexible > array members instead. So, replace one-element array with flexible-array > member in struct vmw_view. > > This helps with the ongoing efforts to tighten the FORTIFY_SOURCE > routines on memcpy() and help us make progress towards globally > enabling -fstrict-flex-arrays=3 [1]. > > This results in no differences in binary output. > > Link: > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FKSPP%2Flinux%2Fissues%2F79&data=05%7C01%7Czackr%40vmware.com%7Ca3eb026ab82f44e3b1d708db0585bd84%7Cb39138ca3cee4b4aa4d6cd83d9dd62f0%7C0%7C0%7C638109844250628429%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=I7IzZMu692BHi68sJFTfSonR4OYW1Kd5D6CENIizrsw%3D&reserved=0 > Link: > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FKSPP%2Flinux%2Fissues%2F254&data=05%7C01%7Czackr%40vmware.com%7Ca3eb026ab82f44e3b1d708db0585bd84%7Cb39138ca3cee4b4aa4d6cd83d9dd62f0%7C0%7C0%7C638109844250628429%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=Hk97x3i6xHOrq09iuDYojySU9H8ulvlArzGXoKrEDtU%3D&reserved=0 > Link: > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgcc.gnu.org%2Fpipermail%2Fgcc-patches%2F2022-October%2F602902.html&data=05%7C01%7Czackr%40vmware.com%7Ca3eb026ab82f44e3b1d708db0585bd84%7Cb39138ca3cee4b4aa4d6cd83d9dd62f0%7C0%7C0%7C638109844250628429%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2B3QRmhuEvEOem89Do6hpS3%2B5sFDcuS%2BWWh9yv6triog%3D&reserved=0 > [1] > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > --- > drivers/gpu/drm/vmwgfx/vmwgfx_so.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_so.c > b/drivers/gpu/drm/vmwgfx/vmwgfx_so.c > index 4ea32b01efc0..0f696ccaddc6 100644 > --- a/drivers/gpu/drm/vmwgfx/vmwgfx_so.c > +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_so.c > @@ -70,7 +70,7 @@ struct vmw_view { > unsigned view_id; /* Immutable */ > u32 cmd_size; /* Immutable */ > bool committed; /* Protected by binding_mutex */ > - u32 cmd[1]; /* Immutable */ > + u32 cmd[]; /* Immutable */ > }; > > static int vmw_view_create(struct vmw_resource *res); Reviewed-by: Zack Rusin <zackr@vmware.com> Will this go in through linux-next directly or do you want me to push it through drm-misc-next? z
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_so.c b/drivers/gpu/drm/vmwgfx/vmwgfx_so.c index 4ea32b01efc0..0f696ccaddc6 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_so.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_so.c @@ -70,7 +70,7 @@ struct vmw_view { unsigned view_id; /* Immutable */ u32 cmd_size; /* Immutable */ bool committed; /* Protected by binding_mutex */ - u32 cmd[1]; /* Immutable */ + u32 cmd[]; /* Immutable */ }; static int vmw_view_create(struct vmw_resource *res);
One-element arrays are deprecated, and we are replacing them with flexible array members instead. So, replace one-element array with flexible-array member in struct vmw_view. This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines on memcpy() and help us make progress towards globally enabling -fstrict-flex-arrays=3 [1]. This results in no differences in binary output. Link: https://github.com/KSPP/linux/issues/79 Link: https://github.com/KSPP/linux/issues/254 Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> --- drivers/gpu/drm/vmwgfx/vmwgfx_so.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)